giswindows

GIS Windows we are rightly proud to be double glazing suppliers and manufacturers. With 34 years of experience, we have strived to supply the highest... read more

GIS Windows we are rightly proud to be double glazing suppliers and manufacturers. With 34 years of experience, we have strived to supply the highest quality double-glazed windows, doors and conservatories with the best customer service. Our team has built up an enviable reputation for honest, factual and friendly service, which extends far beyond the sales room Unlike many double glazing suppliers and manufacturers all of our products are produced in the groups own factory ensuring total control of the process.